3 - Programming Examples
Maximum Voltage
The maximum input voltage that can be programmed can be queried with:
VOLTage? MAXimum
Input Current
All models have a programmable current function. The command to program the current is:
CURRent <n>
where <n> is the input current in amperes.
Maximum Current
The maximum input current that can be programmed can be queried with:
CURRent? MAXimum
Overcurrent Protection
The electronic load can also be programmed to turn off its input if the current protection level is reached.
As explained in chapter 4, this protection feature is implemented the following command:
CURRent:PROTection:STATe ON | OFF
Use CURRent:PROTection:DELay to prevent momentary current limit conditions caused
NOTE:
by programmed input changes from tripping the overcurrent protection.
Setting the Triggered Voltage or Current Levels
To program voltage or current triggered levels, you must specify the voltage or current level that the input
will go to once a trigger signal is received. Use the following commands to set a triggered level:
VOLTage:TRIGgered <n>
CURRent:TRIGgered <n>
Until they are explicitly programmed, triggered levels will assume their corresponding
NOTE:
immediate levels. For example, if a electronic load is powered up and VOLTage:LEVel is
programmed to 6, then VOLTage:LEVel:TRIGger will also be 6 until you program it to
another value. Once you program VOLTage:LEVel:TRIGger to a value, it will remain at
that regardless of how you subsequently reprogram VOLTage:LEVel. Then, when the
trigger occurs, the VOLTage:LEVel is set to the VOLTage:LEVel:TRIGger value.
Generating Triggers
You can generate a single trigger by sending the following command over the GPIB:
TRIGger:IMMediate
Note that this command will always generate a trigger. Use the TRIGger:SOURce command to select
other trigger sources such as the mainframe's external trigger input.
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